16d. Small key locking in a painting (8) *E*S*A**
17d. First of cops on track for Bow Street ? (8) *R*S*E**
27a. Turn bridge partner makes you pass on (2 , 4) *O/****
6d. Even Mafia characters go off pastry served up here ? (9)
T***T*R*A TRATTORIA ? but parsing ?